Funny you should bring that up. Concern about mountain lions snacking on mini horses had me worried and trying to think up countermeasures. Then I happened on why you often see donkeys grazing with horses...

They have been known to kill mountain lions. No joke. And gelded jacks are not hard to live with.

Then thinks I, gee, another possible use for a donkey... one could get way back in there, bring along some comforts, and have a fairly easy way to get the carcass out.